All names: USNO 425, NLTT 17953, G107-70A, USNO-B1.0 1381-00227164, Zkh 105, PMSC 07234+4824BC, 07307+4810A, PM J07307+4810, WD 0727+482, WISEA J073047.07+481013.1, GJ 275.2 B, CSI+48-07271, 2MASS J07304735+4810275, G 107-70, LHS 230, UBV 7227, WDS J07307+4813B, USNO 824, EGGR 52, ** WNO 49, GEN# +9.80107070, LHS 230A, uvby98 980107070, G 193-51, G107-70A/B, WD 0727+48, G 111-8, PM 07271+4818, ** GIC 75B, LSPM J0730+4810, TIC 328328649, WDS J07307+4813BaBb
| Parameter | Unit | Pan-STARRS DR1 | Stilism | Holberg et al. 2016 | Limoges et al. 2015 | Giammichele et al. 2012 | Holberg et al. 2008 | Bergeron et al. 2001 | Bergeron et al. 1997 | Simbad | White Dwarf Catalog (McCook & Sion 1999) |
|---|---|---|---|---|---|---|---|---|---|---|---|
| Right ascension | 07 30 47.31 (129) | 07 30 48.98 | |||||||||
| Declination | 48 10 26.61 (83) | 48 11 04.56 | |||||||||
| Spectral type | DA | DA | DA | DA | DA | DA+DA | DA | ||||
| Effective temperature | [K] | 4934.0 (81) | 4910.0 (105) | 4934.0 (81) | 5020.0 (120) | 4900.0 (80) | |||||
| log(g) | [cgs] | 7.89 (0.02) | 7.86 (0.02) | 7.89 (0.02) | 7.92 (0.02) | 7.35 (0.02) | |||||
| Mass | [M☉] | 0.599 (0.01) | 0.5 (0.01) | 0.51 (0.01) | 0.53 (0.01) | 0.27 (0.01) | |||||
| log(Luminosity) | [L☉] | -4.01 | -4.01 | -4.00 (0.01) | -3.76 (0.01) | ||||||
| Cooling age | [Gyr] | 5.1500 | 4.6800 | 4.6000 (0.2) | 2.0000 (0.04) | ||||||
| log(H/He) | |||||||||||
| log(C/He) | |||||||||||
| log(Ca/He) | |||||||||||
| log(Ca/H) | |||||||||||
| log(C/H) | |||||||||||
| log(N/H) | |||||||||||
| log(O/H) | |||||||||||
| log(Na/H) | |||||||||||
| log(Mg/H) | |||||||||||
| log(Al/H) | |||||||||||
| log(Si/H) | |||||||||||
| log(P/H) | |||||||||||
| log(S/H) | |||||||||||
| log(Sc/H) | |||||||||||
| log(Ti/H) | |||||||||||
| log(Cr/H) | |||||||||||
| log(Mn/H) | |||||||||||
| log(Fe/H) | |||||||||||
| log(Ni/H) | |||||||||||
| Parallax | [mas] | 90.00 (1) | 90.00 (1) | 90.00 (1) | 90.00 (10) | 90.00 (1) | 90.00 (1) | 83.48 | 86.90 (26) | ||
| Distance | [pc] | 11.11 (0.1) | 11.10 (2) | 11.10 (0.1) | 11.01 | 11.11 (0.1) | 11.11 (0.1) | 11.98 | 11.51 (3) | ||
| Composition | H | H | H | H | H | H | |||||
| Proper motion (right ascension) | [mas/yr] | -224.0 (3) | |||||||||
| Proper motion (declination) | [mas/yr] | -1262.0 (2) | |||||||||
| Variability | |||||||||||
| Magnetic | |||||||||||
| Bd | [MG] | ||||||||||
| Infrared excess (disk) | |||||||||||
| Binarity | DDu | DDu | yes | ||||||||
| B magnitude | 16.24 | 16.24 | 15.63 | 15.61 | |||||||
| V magnitude | 15.26 | 15.26 | 15.26 | 14.65 | |||||||
| R magnitude | 14.73 | 14.73 | 14.12 | 14.40 | |||||||
| I magnitude | 14.24 | 14.24 | 13.63 | ||||||||
| J magnitude | 13.66 | 13.66 | 13.05 | 13.08 (0.02) | |||||||
| H magnitude | 13.42 | 13.42 | 12.81 | 12.84 (0.02) | |||||||
| K magnitude | 13.33 | 13.33 | 12.72 | 12.76 (0.03) | |||||||
| u magnitude | |||||||||||
| g magnitude | |||||||||||
| r magnitude | |||||||||||
| i magnitude | |||||||||||
| z magnitude | |||||||||||
| G magnitude | |||||||||||
| BP magnitude | |||||||||||
| RP magnitude | |||||||||||
| Pan g magnitude | 15.06 (0.0006) | ||||||||||
| Pan r magnitude | 14.48 (0.002) | ||||||||||
| Pan i magnitude | 14.15 (0.002) | ||||||||||
| Pan z magnitude | 14.07 (0.01) | ||||||||||
| Pan y magnitude | 14.03 (0.008) | ||||||||||
| E(B-V) | 0.000 | ||||||||||
* Constant surface field
Spectra without link are available upon request
The Montreal White Dwarf Database is produced and maintained by Prof. Patrick Dufour (Université de Montréal) and Dr. Simon Blouin (University of Victoria). Please send database updates, corrections, suggestions or bug reports to patrick.dufour@umontreal.ca.